Pairs of reactants (R) and product (P) are given below. The pair which can be used in a fuel cell is :
1.
2.
3.
4.
1. | pH of the solution will rise. | 2. | pH of the solution will fall. |
3. | No change in the pH of the solution. | 4. | None of the above. |
Molten sodium chloride conducts electricity due to the presence of:
1. Free ions.
2. Free molecules.
3. Free electrons.
4. Atoms of sodium and chlorine.
The resistance of a cell containing 0.001 M KCl solution at 298 K is 1500 Ω. The conductivity is 0.146 × 10–3 S cm–1. The cell constant would be-
1. | 2. | ||
3. | 4. |
The amount of charge required for the reduction of 1 mol of to is -
On electrolysis of dilute sulphuric acid using Platinum (Pt) electrode, the product obtained at the anode will be:
1. Oxygen gas
2. gas
3. gas
4. Hydrogen gas
The electrode potential for Mg electrode varies according to the equation
\(E_{Mg^{2+}/Mg}\ = \ E_{Mg^{2+}/Mg}^{o} \ - \ \frac{0.059}{2}log\frac{1}{[Mg^{2+}]}\)
The graph of EMg2+ / Mg vs log [Mg2+] among the following is:
1. | 2. | ||
3. | 4. |
The correct statement among the following options is:
1. | Ecell and ∆rG of cell reaction are both extensive properties. |
2. | Ecell and ∆rG of cell reaction are both intensive properties. |
3. | Ecell is an intensive property while ∆rG of cell reaction is an extensive property. |
4. | Ecell is an extensive property while ∆rG of cell reaction is an intensive property. |
The incorrect statement about an inert electrode in a cell is:
1. | It does not participate in the cell reaction. |
2. | It provides a surface either for oxidation or for the reduction reaction. |
3. | It provides a surface for the conduction of electrons. |
4. | It provides a surface for redox reaction. |
The cell constant of a conductivity cell-
1. | Changes with the change of electrolyte. |
2. | Changes with the change of concentration of electrolyte. |
3. | Changes with the temperature of the electrolyte. |
4. | Remains constant for a cell. |